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GPT-5.2 Codex vs Grok 4
A detailed comparison of GPT-5.2 Codex (OpenAI) and Grok 4 (xAI) across pricing, performance, and features.
Pricing Comparison
| Metric | GPT-5.2 Codex | Grok 4 | Difference |
|---|---|---|---|
| Input / 1M tokens | $1.75 | $3.00 | +71% |
| Output / 1M tokens | $14.00 | $15.00 | +7% |
| Context window | 200K | 128K | — |
| Max output | 65.536K | 16.384K | — |
Benchmark Comparison
| Benchmark | GPT-5.2 Codex | Grok 4 |
|---|---|---|
| MMLU-Pro | 89% | 86% |
| HumanEval | 95.5% | 93% |
| GPQA | 76% | 72% |
Capabilities
| Capability | GPT-5.2 Codex | Grok 4 |
|---|---|---|
| code | ✓ | ✓ |
| reasoning | ✓ | ✓ |
| text | ✓ | ✓ |
| tool-use | ✓ | ✓ |
| vision | ✓ | ✓ |
| web-search | ✗ | ✓ |
GPT-5.2 Codex Strengths
- ✓Strong coding performance
- ✓Available via API now
- ✓200K context window
GPT-5.2 Codex Weaknesses
- ✗Being superseded by 5.3
- ✗Higher output cost than some competitors
Grok 4 Strengths
- ✓Built-in web search and real-time data
- ✓Strong reasoning
- ✓$25 free credits for new users
Grok 4 Weaknesses
- ✗Premium pricing for its benchmark tier
- ✗Additional charges for tool invocations ($2.50-$5/1K calls)
- ✗Smaller ecosystem than OpenAI/Anthropic
Quick Verdict
Best value: GPT-5.2 Codex is the more affordable option at $1.75/$14 per 1M tokens.
Higher benchmarks: GPT-5.2 Codex scores higher on average across available benchmarks (86.8% avg).
Larger context: GPT-5.2 Codex supports 200K tokens.
Choose GPT-5.2 Codex if cost matters most. Choose Grok 4 if you need the best possible quality for complex tasks.